<template>
  <div class="upload-file">
    <el-upload
      :action="uploadFileUrl"
      :before-upload="handleBeforeUpload"
      :limit="limit"
	  :accept="accept"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      :on-success="handleUploadSuccess"
      :show-file-list="false"
      :headers="headers"
      :disabled="isDisabled"
      class="upload-file-uploader"
      :class="isDisabled?'disabled':''"
      ref="upload"
    >
      <!-- 上传按钮 -->
      <el-button size="default" type="primary">选取文件</el-button>
      <!-- 上传提示 -->
      <div class="el-upload__tip" style="float:right;margin-left: 15px;" slot="tip" v-if="showTip">
        请上传
        <template v-if="fileSize">
          大小不超过
          <b style="color: #f56c6c">{{ fileSize }}MB</b>
        </template>
        <template v-if="fileType">
          格式为
          <b style="color: #f56c6c">{{ fileType.join("/") }}</b>
        </template>
        的文件
      </div>
    </el-upload>

    <!-- 文件列表 -->
	<transition-group class="upload-file-list el-upload-list el-upload-list--text" name="el-fade-in-linear" tag="ul">
	  <li :key="file.uid" class="el-upload-list__item ele-upload-list__item-content" v-for="(file, index) in fileList">
	    <div  style="cursor: pointer;">
	      <span class="el-icon-document" @click="downloadReport(file)"> {{file.name}} </span>
	    </div>
	    <div class="ele-upload-list__item-content-action" style="display:flex;align-items:center;margin-right: 20px;">
          <span type="text" @click="downloadReport(file)" style="color:blue;margin-right:10px;cursor: pointer;">下载</span>
          <el-button type="text" @click="handleDelete(file, index)" style="color:red" :disabled="isDisabled">删除</el-button>
        </div>
	  </li>
	</transition-group>
  </div>
</template>

<script>
import { getToken } from "@/utils/auth";
//工具类
import { getUrlParam } from "@/utils/index";

export default {
  name: "FileUpload",
  props: {
    // 值
    value: [String, Object, Array],
    // 数量限制
    limit: {
      type: Number,
      default: 5
    },
    // 大小限制(MB)
    fileSize: {
      type: Number,
      default: 5
    },
	accept:{
		type: String,
		default: '',
	},
    // 文件类型, 例如['png', 'jpg', 'jpeg']
    fileType: {
      type: Array,
      default: () => [
        "jpeg",
        "jpg",
        "png",
        "bmp",
        "tif",
        "gif",
        "avi",
        "mp4",
        "mp3",
				"m4a",
        "pdf",
        "doc",
        "docx",
        "txt",
        "zip",
        "xlsx",
        "xls",
        "ppt",
        "pptx"
      ]
    },
    // 是否显示提示
    isShowTip: {
      type: Boolean,
      default: false
    },
    // 是否禁用
    isDisabled: {
      type: Boolean,
      default: false
    }
  },
  computed:{
	  baseUrl:()=>{
		  return `${window.location.origin}${process.env.VUE_APP_API_PREFIX}`
	  }
  },
  mounted() {
	  console.log('filePathfilePathfilePath',this.value)
  	if(this.value){
		
		let list = this.value.split(',');
		this.fileList = list.map((item)=>{
			let label = {
				name: decodeURIComponent(item.split('oldFileName=')[1]),
				url:item
			}
			return label
		})
	}
  },
  data() {
    return {
      uploadFileUrl: process.env.VUE_APP_API_PREFIX + "/common/upload", // 上传的图片服务器地址
      headers: {
        Authorization: "Bearer " + getToken()
      }, //token信息
      fileList: [], //存放图片的地方
      downloadName: "" //下载文件名
    };
  },
  watch: {
    value: {
      handler(val) {
        if (val) {
			let list = val.split(',');
			this.fileList = list.map((item)=>{
				let label = {
					name: decodeURIComponent(item.split('oldFileName=')[1]),
					url:item
				}
				return label
			})
        } else {
          this.fileList = [];
          return [];
        }
      },
      deep: true,
      immediate: true
    }
  },
  computed: {
    // 是否显示提示
    showTip() {
      return false;
    }
  },
  methods: {
    // 上传前校检格式和大小
    handleBeforeUpload(file) {
      // 校检文件类型
      if (this.fileType) {
        let fileExtension = "";
        if (file.name.lastIndexOf(".") > -1) {
          fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
        }
        const isTypeOk = this.fileType.some(type => {
          if (file.type.indexOf(type) > -1) return true;
          if (fileExtension && fileExtension.indexOf(type) > -1) return true;
          return false;
        });
        if (!isTypeOk) {
          this.$message.error(
            `文件格式不正确, 请上传${this.fileType.join("/")}格式文件!`
          );
          return false;
        }
      }
      // 校检文件大小
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$message.error(`上传文件大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      return true;
    },
    // 文件个数超出
    handleExceed() {
      this.$message.error(`上传文件数量不能超过 ${this.limit} 个!`);
    },
    // 上传失败
    handleUploadError(err) {
      this.$message.error("上传失败, 请重试");
    },
    // 上传成功回调
    handleUploadSuccess(res, file) {
		if(res.code==200){
			this.$message.success("上传成功");
			this.fileList.push({ name: decodeURIComponent(res.url.split('oldFileName=')[1]), url: res.url });
			this.$emit("modelValue", this.fileList);
		}else{
			this.$message.error(res.msg);
		}
    },
    // 删除文件
    handleDelete(file, index) {
      this.fileList.splice(index, 1);
      this.$emit("modelValue", this.fileList);
    },
    // 获取文件名称
    getFileName(name) {
      if (name.lastIndexOf("/") > -1) {
        return name.slice(name.lastIndexOf("/") + 1).toLowerCase();
      } else {
        return "";
      }
    },
    // 对象转成指定字符串分隔
    listToString(list, separator) {
      let strs = "";
      separator = separator || ",";
      for (let i in list) {
        strs += list[i].url + separator;
      }
      return strs != "" ? strs.substr(0, strs.length - 1) : "";
    },
    // 解决下载文件 文件名问题
    async downloadReport(url) {
      let res = await fetch(`${window.location.origin}${process.env.VUE_APP_API_PREFIX}${url.url}`);
      let blob = await res.blob();
      let blobUrl = URL.createObjectURL(blob);
      const link = document.createElement("a");
      link.style.display = "none";
      link.href = blobUrl;
      link.download = url.name;
      link.click();
    }
  }
};
</script>

<style scoped lang="less">
.upload-file-uploader {
  margin-bottom: 5px;
  &.disabled {
    .el-button {
      cursor: not-allowed;
    }
  }
}
.upload-file-list .el-upload-list__item {
  border: 1px solid #e4e7ed;
  line-height: 2;
  margin-bottom: 10px;
  position: relative;
}
.upload-file-list .ele-upload-list__item-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: inherit;
}
.ele-upload-list__item-content-action .el-link {
  margin-right: 10px;
}
:deep(.el-upload) {
  text-align: left;

  .el-button {
    width: 100px;
  }
}
</style>
